Tag: "water" at biology news
Mysterious beach closures may be linked to contaminated groundwater, study finds
...ytan decided to conduct a chemical analysis of the water
at Huntington Beach using a technique known as iso...radium isotope levels, the Stanford team collected water
samples at Huntington Beach from Aug. 2 to Sept. 12, 2003. Researchers scooped up large amounts of s...
Researchers target deficit irrigation for wine grapes
...ns may help wine grape growers conserve irrigation water
without reducing grape yield or quality. "The con...ve the vines less than 100 percent of their actual water
needs prior to veraison, or ripening," said Ed Hellman, Texas Cooperative Extension viticulture spec...
Scientists discover secret of dolphin speed
...ined bodies which help them reduce the pressure of water
against their skin (known as the 'form drag') as w...ailed computer simulation which models the flow of water
over a dolphin's skin, modelling every individual flake of skin itself, and the way it peels off. Pr...
Tips from the Journals of the American Society for Microbiology
...more effective and timely at disinfecting drinking water
and wastewater say researchers from the U.S. Milit...co-disinfectant in swimming pools and hospital hot water
systems since the mid-1800's, silver has been somewhat effective at bactericidal activity with littl...
Nonalcoholic beverages may impart cardiovascular benefits without the negative effects of alcohol
...lar beer, nonalcoholic beer, or alcohol mixed with water
(v/v 4%) during a three-hour period on 12 young, healthy male volunteers (19 - 36 years of age). Blood samples were drawn for analysis before and at 1.5, 3.5 and 24 hours after the beginning of consumption. All three fluids regular beer, nonalcohol...
Increased atmospheric carbon dioxide promotes algal growth
...ect of the effects of the plants themselves on the water
chemistry. In the June issue of Ecology Letters , Schippers, Lrling and Scheffer of the Wageningen University show that, if this effect is included, productivity may double due to a doubling of the atmospheric carbon dioxide concentration. In pract...
Earth, sky tapped in unique global climate change study
...e sheltered plots, and the researchers alter their water
source with trace minerals to equal that of the ar...d without the protective coverings, heat lamps and water
sprinklers as a check for how the species would grow under current temperatures and precipitation. ...
Whales, seals or men? Who stole all the fish?
...mammals. For each sighting, she noted ocean depth, water
temperature, and distance from the ice edge. This ...ws, Scotland. "It would be nice if this could pour water
on the fervour that says we need to take measures all over the place to deal with this." Written by...
Protein keeps cold fish from becoming frozen flounder, new study shows
...archers helps explain why fish swimming in icy sea water
don't freeze. The team, led by Biochemistry Professor Peter Davies, has identified a new "antifreeze" protein found in the blood of winter flounder enabling the fish to withstand temperatures as low as -1.9 degrees Celsius: the freezing point of sea ...
Mimicking humpback whale flippers may improve airplane wing design
... flippers. The row of tubercles sheers the flow of water
and redirects it into the scalloped valley between...ed them," he said. Humpback whales maneuver in the water
with surprising agility for 44-foot animals, particularly when they are hunting for food. By exhalin...
Botulinum toxin structure offers clues for vaccines/treatments
...es increase the distance between a zinc atom and a water
molecule crucial to the cleaving process by a mere 0.6 angstroms (an angstrom is one ten-billionth of a meter). That subtle change disturbs the electrostatic properties of the molecule at the active site, making it unable to cleave the target protein...
Lewis and Clark data show a different Missouri River
...ver - from the logs of Lewis and Clark - show that water
flow on the river today is far more variable than it was 200 years ago. The data also show that the river is some 220 yards narrower at St. Charles, Mo., today at 500 yards across than in 1804 when it spread out some 720 yards. These change...
Into the dead zone: Galveston researcher examines loss of marine life
...weeks ahead. "We will look at the nutrients in the water
in the dead zone area, look at the water
color and examine the bacterial communities," she says. "We want to determine what specific biologic...
Tiny beetle wreaks havoc on Texas ornamental tree nurseries
...em, the collection of tiny vessels that transports water
and nutrients to the plant cells. "It's really the ambrosia fungus that kills the tree, not the beetle," Ludwig said. No one knows why the insect made such an impact this year, but Ludwig said it's suspected that mild winters have played a big rol...
Sediments in many Central Valley streams contain toxic levels of pyrethroid pesticides
...safe for fish and other organisms that live in the water
column, but no one has studied their effect on sed... Agency (EPA) as indicators of the health of fresh water
sediment. Weston and colleague Michael J. Lydy (LIE-dee) of Southern Illinois University (SIU) in Ca...
Plankton may influence climate change says UCSB scientist
...ey inhabit the upper layers of any natural body of water
where there is enough light to support photosynthetic growth. They are the base of the ocean's food web, and their production helps to regulate the global carbon cycle. They also contribute to the global cycling of many other compounds with climate i...
ESA's minature Earth observer put to many uses
...en cotton species, crops with high, normal and low water
content and also high and low fertility of the underlying soil. Working over water
CHRIS was designed for Earth Observation over land surfaces, but a number of research teams are in...
For a male sand goby, playing 'Mr. Mom' is key to female's heart
...said. The fish also use their pectoral fins to fan water
over the eggs, creating a current of fresh, oxygenated water
needed for them to mature. In the experiment, the researchers allowed male and female gobies to mat...
Could vitamins raise levels of bad cholesterol? Animal study suggests they might
...ed fatty acids, the good fatty acids found in cold water
fish, are healthy for the heart. In another series of experiments, the scientists show that omega-3 and omega-6 fatty acids activated the pathway in the liver that breaks down the bad lipoproteins. Dr. Fisher's group recently described this pathway, ...
Staying close to mother helps baby dolphins swim
...swimming. His analyses showed that the movement of water
around the two dolphins generates two effects, both of which help the younger dolphin stay with its mother. The first is similar to the slipstream effect that is well known to racing cyclists, while the second (the Bernoulli effect, which also cause...
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